Regulator valve



FIG. 1 is a top, front, right and top perspective view of a three-way ¼″ regulator valve showing my new design;

FIG. 2 is a bottom, left and rear view thereof;

FIG. 3 is a bottom and rear view thereof; and,

FIG. 4 is a bottom, rear and left view thereof. 

The ornamental design for a regulator valve, as shown and described. 